Returns a hashref whose keys are files relative to the given path and the values are the MD5 sum of the file or and empty string if a directory. It recurses through the entire depth of the directory. Symlinks to files are just addpath()d and symlinks to directories are followed.

Get the digest in various formats of the content at $url (Including, if $url points to directory, the directory listing content). Returns undef if url fails (IE if LWP::UserAgent's $res->is_success is false)